CanvasRenderer .setClearColor() and .setClearColorHex() now sets opacity to 1 when null. Fixes #1636.

This fixes single black face on ANGLE when using mipmaps, just for some reason CubeCamera.updateCubeMap() must be called twice (if doing single shot rendering into cube target).

Added CustomBlending mode. Added texture.premultiplyAlpha parameter. Added standard and custom blending examples.

Thanks to @toji for the suggestion.

Updated the camera object to match the COLLADA schema elements and added orthographic camera support.

This probably could be done in some nicer way, but at least there is no more direct dependency in WebGLRenderer (and lib shrunk ;).

Transplanted from ro.me repo, ported to use new lib version, modernized code.

Removed extra ',' in object declaration, breaks minification/packing. Added in missing semi-colon (;)

ExtrudeGeometry using TubeGeometry internally for TNB frames. Added webgl_geometry_extrudePath.html to test ExtrudeGeometry